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WO2013039980A1 - Procédé de sélection d'agents tensio-actifs dans une stimulation de puits - Google Patents

Procédé de sélection d'agents tensio-actifs dans une stimulation de puits Download PDF

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Publication number
WO2013039980A1
WO2013039980A1 PCT/US2012/054768 US2012054768W WO2013039980A1 WO 2013039980 A1 WO2013039980 A1 WO 2013039980A1 US 2012054768 W US2012054768 W US 2012054768W WO 2013039980 A1 WO2013039980 A1 WO 2013039980A1
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WO
WIPO (PCT)
Prior art keywords
surfactant
determining
formation
water
sample
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2012/054768
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English (en)
Inventor
Liang Xu
Qiang Fu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multi Chem Group LLC
Original Assignee
Multi Chem Group LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Multi Chem Group LLC filed Critical Multi Chem Group LLC
Priority to EP12831838.3A priority Critical patent/EP2756159A4/fr
Priority to RU2014112787A priority patent/RU2611804C2/ru
Priority to BR112014006155A priority patent/BR112014006155A2/pt
Priority to CA2848366A priority patent/CA2848366C/fr
Priority to MX2014003146A priority patent/MX352635B/es
Priority to CN201280045209.9A priority patent/CN104011172A/zh
Priority to AU2012308808A priority patent/AU2012308808B2/en
Publication of WO2013039980A1 publication Critical patent/WO2013039980A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/602—Compositions for stimulating production by acting on the underground formation containing surfactants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
    • C09K8/584—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids characterised by the use of specific surfactants
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/62—Compositions for forming crevices or fractures
    • C09K8/66—Compositions based on water or polar solvents
    • C09K8/68—Compositions based on water or polar solvents containing organic compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/60—Compositions for stimulating production by acting on the underground formation
    • C09K8/84—Compositions based on water or polar solvents
    • C09K8/86—Compositions based on water or polar solvents containing organic compounds
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N13/00—Investigating surface or boundary effects, e.g. wetting power; Investigating diffusion effects; Analysing materials by determining surface, boundary, or diffusion effects
    • G01N13/02—Investigating surface tension of liquids
    • G01N2013/0275—Investigating surface tension of liquids involving surface-active agents

Definitions

  • the disclosure relates generally to the field of fracturing fluids used in fracturing subterranean formations during hydrocarbon recovery. More specifically the disclosure relates to methods for selecting surfactants used in fracturing fluids.
  • Hydraulic fracturing is a formation stimulation technique used to create additional permeability in a producing formation to increase the flow of hydrocarbons toward the wellbore.
  • a high hydraulic pressure is used to fracture the subterranean formation, creating cracks that facilitate the increased flow of hydrocarbons.
  • proppants are used to keep cracks open that are created during the fracturing operation.
  • Fracturing fluids include a number of components and are most often water-based. These components typically include acids, biocides, breakers, corrosion inhibitors, friction reducers, gels, iron control chemicals, oxygen scavengers, surfactants and scale inhibitors.
  • FIG. 1 is an example of a model of dynamic surface tension measurements as a function of time, according to one or more aspects of the present disclosure
  • FIG. 2 is a graph of diffusion coefficients of various surfactants in accordance with Example 2.
  • FIG. 3 is a graph comparing the phase separation rates of a non-emulsifying surfactant with a weakly emulsifying surfactant in accordance with Example 3.
  • FIG. 4 illustrates the droplet size distributions of a non-emulsifying surfactant with a weakly emulsifying surfactant in accordance with Example 3.
  • FIG. 5 is a production table illustrating the field example.
  • the methods described herein relate generally to the field of gas and oil production. In particular, methods of selecting surfactants for fracturing fluids are described.
  • the present disclosure describes a number of tests that may be performed to select a particular surfactant for a fracturing fluid. In one embodiment, all of the tests are used. In other embodiments, select tests may be performed. These tests may be performed in any order and the order described below is non-limiting.
  • the tests include:
  • Water solubility- A surfactant may be tested to if that surfactant is soluble in water. A water solubility test may assist in selecting a surfactant to determine if that surfactant is able to travel with the leading edge of a water front and reach the interior of the rock formation;
  • Emulsion tendency A visual inspected of oil and water containing surfactants may be performed and emulsion droplet size and zeta potential may be determined to understand the tendency of a surfactant to create aweak or transient oil in water emulsion;
  • crushed formation cores or drill cuttings may be saturated with crude oil from the same formation and the surfactant solution is passed through the cores that are packed in a glass column. Effluents are collected and oil recovery by individual surfactants may be quantified.
  • Surfactants that are soluble or dispersible in water may more easily reach the interior of the formation. Because of the surface tension gradient or the Gibbs-Marangoni effect, where surfactants diffuse from the areas of low surface tensions to those of high surface tensions, surfactants can remain at the tip of the water front and further penetrate the formation. In this test, fresh or source water from the formation is typically used and different concentrations of the chosen surfactant is added to the water. If the surfactant is soluble or dispersible, the water typically remains clear or slightly cloudy. If insoluble, the water typically turns turbid or opaque. In certain cases where the surfactant is insoluble, precipitates may be found.
  • HLB hydrophile-lipophile balance numbers
  • a turbidity meter may be used to monitor the cloudiness or turbidity of the solutions.
  • the permeability may be in the nanodarcies or millidarcies ranges. Consequently, the flow path for oil molecules to migrate from the interior of the reservoirs to the artificial propped fractures created in a hydraulic fracturing process may be confined and/or limited.
  • a surfactant may be needed to minimize the formation damage induced by large quantities of water and enhance the oil and gas production.
  • a non-emulsifying surfactant is used so that less oil/water emulsion is generated.
  • a weak emulsifying surfactant may be used to enhance the formation production.
  • an emulsification test is used to quantify the phase separation rates and emulsion droplet size distribution by monitoring the emulsion with dynamic light scattering measurements. Surfactants may then be screened to remove surfactants that may separate too quickly, have a droplet size larger than 10 microns and a loose distribution, resulting in possible poor field production.
  • Dynamic and static surface tension are two physical properties of the surfactants that typically determine the surface tension between air/gas and surfactant solutions. Whether it is at air/liquid or solid/liquid interface, surfactants travel to the interface from the bulk of the solution. The speed with which the surfactants travel plays a significant role in processes where new interfaces are generated.
  • Dynamic surface tension measurements may record surface tension reduction as a function of time. Dynamic surface tension may relate to processes such as foaming, bubble dynamics, solubilization and detergency, emulsion droplet size and thin film stability. Without being bound by theory, it is believed that as time elapses, there is sufficient time available for more surfactant molecules to travel to and accumulate at the interface. Those molecules may pack tightly at the interface and hence lower the surface tensions between two immiscible phases. A typical measurement is illustrated in FIG. 1 by using a bubble pressure tensiometer such as Kruss BP100. An additional measurement related to this effect may be whether the movement of surfactants to the interface is dominated by diffusion. A characteristic time may be determined and correlated back to the diffusion coefficient of the surfactant.
  • IFT interfacial surface tensions
  • Shale core plugs obtained from thousands of feet below the ground are typically of ultralow permeability and contain oil globules that are deeply trapped inside the pore space in the formation. It may not be feasible to pump the surfactant solution directly through a shale core plug because large differential pressure is required. In addition, the oil recovered from shale core plugs is typically so little that the results are not reproducible. With the oil recovery test of the present disclosure, it is possible to differentiate the oil extraction capabilities by various surfactants and surfactant blends.
  • Adsorption to proppants Proppants including sand or ceramic are usually pumped together with surfactants. Some surfactants tend to adsorb onto the proppant surface and hence do not reach the interior of formation. The adsorbed surfactants may be considered to be lost and might not contribute to oil and gas production. The adsorption of surfactants onto the proppants can be evaluated to account for the loss. The loss to proppants can serve as a reference for comparing various surfactants.
  • the diffusion coefficient was determined from the molecular size a and the volume fraction ⁇ j) b of the surfactant :
  • FIG. 3 compares the phase separation rates of a non-emulsifying surfactant (surf 1-a linear ethoxylated alcohol) and a weakly emulsifying one (surf 2-a linear ethoxylated sulfate).
  • FIG. 4 illustrates the droplet size distributions between surf 1 and surf2.
  • Example 5 (Capillary Pressure): [0057] 3 grams of crushed shale core were loaded into a powder cell and connected to a force transducer. The powder cell was slowly brought to contact to a surfactant solution of 1000 ppm. The weight gain of the powder cell is recorded as a function of time. The square of weight gain is plotted against the time as illustrated by FIG. 5. The slopes of the plots are used to compare the capillary pressure. Typically, the smaller the slopes are, the lower the capillary pressure. It is evident that surf2 enables lower capillary pressure than surfl.
  • a performance index can be assigned to a surfactant, based on the scores from each single test, 10 being the best and 1 being the poorest, respectively.
  • a surfactant is selected and recommended for field applications if its performance index exceeds 35.
  • the performance indices for surfl and surf 2 are indicated below.
  • a surfactant (surf 2) selected from the above-mentioned test matrix was evaluated in a shale formation in South Texas. Initial results shown in FIG. 5 after the first 45 days suggest that the selected surfactant has increased the oil production by 25%, gas production by 50%, as compared to other wells using the previous surfactant.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Health & Medical Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)
  • Cosmetics (AREA)
  • Investigating Or Analysing Biological Materials (AREA)
  • Colloid Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)

Abstract

L'invention concerne un procédé consistant à déterminer le caractère approprié d'un agent tensio-actif destiné à être utilisé dans une formation, qui peut comprendre l'échantillonnage de l'eau dans la formation, et consistant à mettre à disposition au moins deux agents tensio-actifs et à mélanger chacun des agents tensio-actifs avec l'eau de la formation pour former des échantillons agent tensio-actif/eau. Le procédé peut en outre consister à déterminer la solubilité de chaque agent tensio-actif avec l'eau de formation, à comparer la solubilité de chaque agent tensio-actif avec l'autre agent tensio-actif, et à attribuer une valeur de performance de solubilité pour chaque agent tensio-actif sur la base de sa solubilité dans l'échantillon d'eau de formation par comparaison avec l'autre agent tensio-actif.
PCT/US2012/054768 2011-09-15 2012-09-12 Procédé de sélection d'agents tensio-actifs dans une stimulation de puits Ceased WO2013039980A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP12831838.3A EP2756159A4 (fr) 2011-09-15 2012-09-12 Procédé de sélection d'agents tensio-actifs dans une stimulation de puits
RU2014112787A RU2611804C2 (ru) 2011-09-15 2012-09-12 Способ выбора поверхностно-активного вещества для улучшения продуктивности скважины
BR112014006155A BR112014006155A2 (pt) 2011-09-15 2012-09-12 método para determinar a adequação de um agente tensoativo para uso em uma formação
CA2848366A CA2848366C (fr) 2011-09-15 2012-09-12 Procede de selection d'agents tensio-actifs dans une stimulation de puits
MX2014003146A MX352635B (es) 2011-09-15 2012-09-12 Metodo para seleccion de tensoactivos en estimulacion de pozos.
CN201280045209.9A CN104011172A (zh) 2011-09-15 2012-09-12 在油井增产中选择表面活性剂的方法
AU2012308808A AU2012308808B2 (en) 2011-09-15 2012-09-12 Method for selection of surfactants in well stimulation

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201161573967P 2011-09-15 2011-09-15
US61/573,967 2011-09-15

Publications (1)

Publication Number Publication Date
WO2013039980A1 true WO2013039980A1 (fr) 2013-03-21

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PCT/US2012/054768 Ceased WO2013039980A1 (fr) 2011-09-15 2012-09-12 Procédé de sélection d'agents tensio-actifs dans une stimulation de puits

Country Status (9)

Country Link
US (1) US9422470B2 (fr)
EP (1) EP2756159A4 (fr)
CN (1) CN104011172A (fr)
AU (1) AU2012308808B2 (fr)
BR (1) BR112014006155A2 (fr)
CA (1) CA2848366C (fr)
MX (1) MX352635B (fr)
RU (1) RU2611804C2 (fr)
WO (1) WO2013039980A1 (fr)

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CA3095684C (fr) 2018-04-11 2021-01-05 Alchemy Sciences, Inc. Procede de test pour simuler la recuperation d'huile de schiste
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022241111A1 (fr) * 2021-05-14 2022-11-17 Saudi Arabian Oil Company Procédé d'évaluation de tensioactifs pour une récupération assistée du pétrole
US11685857B2 (en) 2021-05-14 2023-06-27 Saudi Arabian Oil Company Method of evaluating surfactants for enhanced oil recovery

Also Published As

Publication number Publication date
EP2756159A4 (fr) 2015-12-16
US20130067999A1 (en) 2013-03-21
CA2848366C (fr) 2018-01-02
BR112014006155A2 (pt) 2017-04-04
CN104011172A (zh) 2014-08-27
MX2014003146A (es) 2014-04-30
US9422470B2 (en) 2016-08-23
AU2012308808B2 (en) 2016-04-28
AU2012308808A1 (en) 2014-03-27
CA2848366A1 (fr) 2013-03-21
RU2014112787A (ru) 2015-10-20
MX352635B (es) 2017-12-01
RU2611804C2 (ru) 2017-03-01
EP2756159A1 (fr) 2014-07-23

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